Steam-generator



2 Sheets-Sheet 2.

(No Model.)

0. W. FOSTER. STEAM GENERATOR.

Patented Nov. 17, 189.1.-

C/LarZeJ WESZ'GI' UNITED STATES PATENT OFFICE.

CHARLES \V. FOSTER, OF NEXV HAVEN, CONNECTICUT.

STEAM-GENERATOR.

SPECIFICATION forming part of Letters Patent No. 463,501, dated November17,1891.

Application filed February 12, 1891 Serial No. 381,206. (No model.)

To all whom it may concern! Be it known that 1, CHARLES W. FOSTER, acitizen of the United States, residing at New Haven, in the county ofNew Haven and State of Connecticut, have invented anew and usefulSteam-Generator, of which the following is a specification.

This invention relates to steamgenerators, and among its objects are toprovide a device of this class which shall be simple and inexpensive,and which, in proportion to its size, shall be provided with a veryextensive heating-surface, and which shall also be so constructed as torender its various parts readily accessible for purposes of examinationor repairs.

\Vith these ends in view the invention consists in the improvedconstruction, arrangement, and combination of parts, which will behereinafter fully described, and particularly pointed out in the claims.

In the drawings hereto annexed, Figure 1 is a side elevation, partly insection, of a steam-generator constructed in accordance with myinvention. Fig. 2 is ahorizontal sectional view of the same. Figs. 3 and4 are detail views of the lower end of one of the pipes 17 and theheader connected therewith. Fig. 5 is a sectional detail view taken onthe line 5 5 in Fig. 2. I

Like numerals of reference indicate like parts in all the figures of thedrawings.

Upon a base 1, which is preferably constructed of cast-iron, is mounteda casing or jacket 2, which is preferably constructed of a doublethickness of sheet-iron and provided with a lining 3 of asbestus for thedouble purpose of protectingthe casing or jacket and of preventing theloss of heat by radiation. .The jacket or casing 2 supports the cap orbonnet 4,which is preferably constructed of cast-iron, and is providedwith a flange 5, fitting over the upper edge of the casing.

The base 1, within which is located the ashpit 6, accessible through asuitable door 7, is provided with a centrally-located sleeve or collar8, which is secured upon the bottom of said base by means of screwsorbolts 9. The central opening 10 of the sleeve 8 is screwthreaded, asshown, and is placed in alignment tire casing and up through the cap orbonnet 4, which is provided with an opening 14: for the passage of thesaid stand-pipe, as well as for the products of combustion,which maybecarried off through a suitably-arranged pipe. The stand-pipe 13 isprovided near its lower end with a series of radially-extending pipes'15, each of which, excepting those which are in alignment with thefurnace-door 16, carries at its outer end a header 16, which connectsthe lower ends of a series of pipes 17, the upper ends of which haveelbows 18, which are independentlyconnected with the stand-pipe 13 abovethe water-line in the latter. In order to avoid weakening the standpipeby making perforations therein too close together, the elbows areconnected with the said stand-pipe at different elevations, as will beclearly seen in Fig. 1 of the drawings, ordinary right and left handthreaded sleeves or couplings being employed to make the connections.The radially-extending pipes 15, which connect the stand-pipe with theheaders at the lower ends of the manifold pipes, serve to support thegrate. It will thus be seen that the furnace or fire-box is formed inthe lower part of the jacket or casing and is completely surrounded bythe vertical manifold pipes, except at the pointwhere the furnace-door16 is located.

21 designates a series of serpentine pipes, the upper and lower ends ofwhich are connected with the stand-pipe respectively above and below thewater-line, short pipe-sections 22 and coupling-sleeves 23 beingemployed to make the desired connections. Of these serpentine pipes, thelower ends of which are directly above the fire-box, any desired numbermay be employed, and it will be observed that said pipes, which arelocated directly in the flame, admit of the free circulation of thewater.

25 designates an exteriorly-arranged standpipe, the upper and lower endsof which are connected with the stand-pipe 13, respectively above andbelow the water-line, by means of the pipes 26. The stand-pipe 25 has anenlargement or chamber 27, to which are connected the water-gage 28 andthe try-cocks 29. The said stand-pipe 25 is also provided with the steamor pressure gage 30. A supply-pipe 31 is suitably connected to thestandpipe 13 near the lower end of the latter.

The operation and advantages of my invention will be readily understoodfrom the foregoing description, taken in connection with the drawingshereto an nexed,by those skilled in the art to which it appertains. Theheating-surface of the steam-generator is formed by the stand-pipe 13,the manifold pipes 17, and the serpentine pipes 21, of which a largenumber may be used without interfering with the draft in the furnace. Itfollows that water may be converted into steam very rapidly and with acomparatively small consumption of fuel. All the parts of the device areeasily accessible for repairs and the construction is simple andinexpensive, W'hen it shall be necessary to blow out the stand-pipe andits connections, the steam connection for this purpose may be made withthe interiorly-tln'eaded opening 10 in the sleeve 8 at the lower end ofsaid stand-pipe. At other times said opening is to be closed by means ofa suitable Valve. The upper end of the stand-pipe forms the steam -domefrom which the steam may be taken in the usual manner. The base 1 isprovided with a suitable bearing for a shaft 32, having at its inner enda spur-wheel 38, meshing with teeth or cogs formed upon the under sideof a disk or carriage 34, mounted revolubly upon the stand-pipe 13 andresting upon the upper sides of the pipes 15, radiating from the latter.The carriage 3i supports the grate-bars 520. The outer end of the shaft32 is provided with a crank 35 or other suitable means, whereby it maybe manipulated to revolve the carriage 34. By this mechanism the gratemay be very conveniently adjusted and rotated, thus facilitating thestarting of fires and enabling the contents of a fire-box to bethoroughly and easily shaken.

Having thus described my invention, what I claim is- 1. In asteam-generator, the combination of a furnacecasing, a standpipeextending through the latter, pipes extending radially from saidstand-pipe and having headers at their outer ends, the manifold pipesconnected at their lower ends by said headers, and connections betweenthe upperends of said manifold pipes and the stand-pipe, substantiallyas set forth.

2. In a steam-generator, the combination of the furnace-casing, thestand-pipe extending through the same, the pipes extending radially fromsaid stand-pipe and having headers at their outer ends, the manifoldpipes connected at their lower ends by said headers, and pipesconnecting the upper ends of said manifold pipes independently with thestand-pipe above the water-line of the latter, substantially as setforth.

In a steam-generator, the combination of the furnace-casing, thestand-pipe extending through the same, pipes extending radially from thesaid stand-pipe near its lower end and having headers at their outerends, the manifold pipes connected at their lower ends by said headers,and independent couplings connecting the upper ends of said manifoldpipes with the said stand-pipe at diiferent elevations, as and for thepurpose set forth.

4. In a steam-generator, the combination of the furnace-casing, thestand-pipe extending through the same, pipes extending radially fromsaid stand-pipe near its lower end and provided with headers at theirouter ends, the manifold pipes having their lower ends connected withsaid headers and their upper ends connected with the stand-pipe, and thegratebars supported upon the pipes extending radially near the lower endof the stand-pipes, substantially as set forth.

5. In a steam-generator, the combination of the furnace-casing, thestand-pipe extending through the same, the manifold pipes arrangedwithin the furnace-easing and having their upper and lower endsconnected with the stand-pipe above and below the water-line, and theserpentine pipes arranged within the furnace-casing and having theirupper and lower ends connected with the stand-pipe, substantially as andfor the purpose set forth.

6. In a steam-generator, the combination of the furnace-casing, the basesupporting the same and having the ash-pit, the stand-pipe extendingthrough the base and furnace-casing and through the cap or bonnet of thelatter, the manifold pipes and the serpentine pipes arranged within thefurnace-casing and having their upper and lower ends connected with astand-pipe above and below the waterline, the feed-pipe connected withthe lower end of the stand-pipe, and the exterior pipe connected withthe stand-pipe above and below the water-line and having a chamber orenlargement, the water-gage and the trycocks connected with saidchamber, and the steam or pressure gage arranged at the upper end of theexterior pipe, substantially as and for the purpose set forth.

7. In a steam-generator, the combination of the base having the ash-pit,the furnace-casing supported upon said base, the sleeve or collarmounted upon the bottom of the base and having an interiorly-threadedopening registering with an opening in the bottom of the base, and aninteriorly-threaded flange,

and the stand-pipe mounted in said flange and extending upwardly throughthe base and the furnace-casing, substantially as and for the purposeset forth.

8. In a steam-generator, the combination of the base, the centralstand-pipe having radiating pipes near its lower end, the carriagemounted revolubly upon the radial pipes supporting the grate-bars andhaving teeth or my own I have hereto affixed mysignaturein cogs on itsunder side, and the shaft journaled presence of two Witnesses. in thebase and having a spur-wheel engag- A w r ing said teeth 01 cogs, allcombined and op- I CHAS 5 crating substantially as and for the purposeWitnesses:

set forth. WALTER POND,

In testimony that I claim the foregoing as JOSEPH D.,RIGGS.

